First of all, let's look at the "up" side of this release. These documents "prove" that war is grittier when viewed by an infantryman than by a policymaker; that Pakistan's intelligence service, the ISI, is a difficult partner; that in war innocent civilians sometimes die; and that the Taliban has been growing in strength over the past several years. Not quite "stop the presses" kind of revelations.
Now the downsides. According to multiple press accounts, despite WikiLeaks' claim that it had redacted source-identifying information from the military's intelligence reports, it apparently did a half-baked job and real names of real people are being exposed.
Beyond that, even when you effectively mask source-identifying data, the enemy knows who did or who did not know about the historic operation or meeting or rendezvous now being made public in a leaked American document.
I can already see the Taliban or al Qaeda dialogue: "Brother, in whose house did we hold that meeting in 2007?"
Finally, I can only imagine what adversary intelligence services worldwide are doing with these documents. If I were the chief of Russia's FSB or China's PLA-2, I would be gathering all of my English-speaking officers and directing them to read all 75,000 documents to learn where the Americans are strong, weak, vulnerable, formidable, to be avoided and to be challenged.
I completely agree with Gen. Hayden's comments in this article. Wikileaks has been completely irresponsible. I don't see any positive side to the release of these documents.